Ron Hardin wrote:
Probably easier just to build a few bandpass filters and measure the
time signal output of each, and pick off peaks in each.

Or use identical low pass filters and multiply each band you want
down to DC (multiply by sine and cosine, and use a complex LPF);
a trivial computation. The LPF determines the filter shape, impulse
response, etc, and you get a complex signal (and so a phase for each
band) in addition to a peak from the envelope.
--
Ron Hardin


On the internet, nobody knows you're a jerk.